Not exactly what you are asking for... but maybe related
When I would image Educational/Adventure game CDs for Junior High school kids I would use ShrinkWrap:
https://macintoshgarden.org/apps/shrinkwrapShrinkWrap images will mount via the finder by a simply double click; you can also do some really cool things like make a whole bunch CD images auto-mount on boot by placing the shrink wrap image alias items in the "startup items".
So... I then would use a program like "kids menu" which locked them out of all the OS features and gave them a simple desktop, the iMac would boot, automount a shitload CD images (5 to 15 disks), and then give them access to the whole library of programs that thought the actual CDs were mounted while being "kid proof" and not letting them destroy the system
Sorry for the tangent, but ShrinkWrap maybe a solution for you with the double-click mounting needs